Steering Hydraulic Deivce for Marine Motors
The invention relates to an hydraulic device for the synchronized steering of at least a pair of marine outboard motors (7, 8), comprising an hydraulic cylinder (6) steering a main motor (7) sliding along a rod (10) parallel to the axis of the tube (9) tilting said motor (7), it is connected to an arm (13) steering said motor (7) by means of an articulated linkage (12), it is rotatable about at least an axis, and by means of articulated linkage (24, 29, 35) it is connected to an arm (17) steering a secondary motor (8). According to the invention, the device comprises a slide guide (14, 14′) stationary associated to the secondary motor (8) which is parallel to the axis of the tube (15) tilting it, and an axial steering slider (16, 16′) that can slide on said guide (14, 14°) and by means of articulated linkage (29, 36) it is connected to the pivotable end of the arm (17) steering the secondary motor (8), and it is slidably driven by means of at least a bar (24, 35) articulately connected with an end to the steering slider (16, 16′) and with the other end connected to the cylinder (6) steering the main motor (7).
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The present invention relates to a steering hydraulic device for marine motors, particularly for a main outboard motor and at least a parallel secondary outboard motor, comprising a double-acting hydraulic cylinder for steering the main motor, which cylinder can slide along a rod whose axis is parallel to the axis of a tube tilting the main motor and it is substantially tangent or parallel to a tangential to the circle described by an arm steering the main motor, which steering arm is connected to said steering cylinder, particularly to a first end of said steering cylinder, by means of an articulated linkage for compensating the distance changes of the steering cylinder from the pivotable end of said arm steering the main motor during steering steps, and which steering cylinder can rotate at least about an axis, preferably about several axes parallel one with respect to the other and parallel to the axis of the tube tilting the main motor, such to allow tilting-up and tilting-down of the main motor, and which cylinder steering the main motor is connected to an arm steering the secondary motor by means of linkage articulated at least according to two axes.
Steering hydraulic devices for marine vessels provided with outboard motors are well known and widely used. Generally they have a steering wheel placed at a certain distance from motors. Said steering wheel drives an hydraulic pump hydraulically connected by means of hydraulic hoses to the cylinder steering the main motor. The secondary motor is generally a passive one, that is its steering is controlled by the cylinder steering the main motor. This is due to the fact that by providing each motor with an active steering cylinder, it would be very difficult to synchronize the sliding and to guarantee the same steering angle of two motors, as well as to the fact that the device would be very expensive. The connection between the cylinder steering the main motor and the steering arm for the secondary motor is generally provided by an articulated linkage that generally is quite complex, as regards construction, since they have to be made in such a way to allow the independent tilting of the two motors. Moreover, with the distance change between steering axes of two motors, it is necessary to replace one or more connecting levers in order to adapt the device to the new situation. Moreover it is quite complex to guarantee the same steering angle between the two motors. Known steering devices generally need a lot of space, above all with one or both motors being tilted, and they can interfere with other components of the marine vessel. Moreover, when a single motor is tilted, it is inclined to converge towards the other one, and this transmits potentially damaged stresses upon various mechanisms.
Therefore the present invention aims to overcome the above drawbacks, and by means of simple and inexpensive means to allow the manufacturing of a device of the type described hereinbefore allowing to have a steering thrust force uniformly distributed on all motors, guaranteeing the maintenance of the same steering angle among various motors, not interfering with other components of the steering system and/or with motor hoods, having the possibility to tilt independently each motor and having the possibility to manoeuvre even if one or more motors are tilted, being extremely adaptable to different situations, above all referring to distance change between the two motors as regards different marine vessels.
The invention attains the above aims by means of a device of the type disclosed hereinbefore comprising a slide guide stationary associated to the secondary motor and it is parallel to the axis of the tube tilting the secondary motor, and a steering axial slider that can slide on said guide and it is connected to the pivotable end of the arm steering the secondary motor by means of articulated linkage working at least according to an axis perpendicular to the axis of the slide guide. Said steering slider can be slidable driven at least by means of a bar articulately connected at least according to an axis with one end to said steering slider and with the other end connected to the second end of the cylinder steering the main motor.
Said steering slider can be further rotatable about its own sliding axis, such to allow independent tilting-up and tilting-down of the secondary motor.
According to a preferred embodiment of the invention that will be disclosed with more detail in drawings, the slide guide of the steering slider for the secondary motor may be retained by means of a nut and fastened on the threaded end of the tube. Arms with opposite ends thereof can be pivotably mounted about the axis of the tube tilting he secondary motor or about an axis parallel to said axis of said tube.
In this case, the steering slider, the slide guide, means fastening said guide and means connecting said steering slider to the arm steering the secondary motor may be substantially a not active copy and having the same degrees of movement freedom of the cylinder steering the main motor, of the rod upon which said cylinder slides, of means fastening said rod and of means connecting said cylinder to the arm steering the main motor.
Advantageously, articulated linkages for connecting the cylinder steering the main motor to the steering slider for the secondary motor may be made in such a way to allow the independent tilting of the two motors.
Particularly, the bar connecting the steering slider for the secondary motor to the cylinder steering the main motor may have, at each opposite ends, a ball joint coupling to the slider steering the secondary motor and to the cylinder steering the main motor respectively.
Referring to another preferred embodiment that will be disclosed in more details in drawing disclosure, the axis of the slide guide of the slider steering the secondary motor may coincides with the axis of the tube tilting the secondary motor.
Said slide guide of the slider steering the secondary motor may be an axial extension of the spindle about which the tube tilting the secondary motor rotates.
Particularly, the axis of the slide guide of the slider steering the secondary motor may be an intermediate extension of axes of the tube tilting the main motor and of the tube tilting the secondary motor, approximately co-axial or co-axial one with respect to the other.
The steering slider for the secondary motor may be composed of two separate members, which two members are slidably integral one with respect to the other along the slide guide, a first member being rotatable independently from a second member about the axis of the slide guide.
The first member may be composed of an arm radially extending outwards with respect to the slide guide and to the free end thereof a bar for coupling the cylinder steering the main motor is connected.
Said bar for coupling the cylinder steering the main motor to the first radial arm may be lengthwise adjustable within predetermined stops, such that the device can be adapted to different distances between the two motors.
Said coupling bar may have two end portions for coupling to the cylinder steering the main motor and the first radial arm respectively.
According to an improvement, means for adjusting the distance of one or both the coupling end portions of the coupling bar from, respectively, the end of the first radial arm and from the fastening point to the cylinder steering the main motor according to a transverse axis, particularly perpendicular, to the axis of said coupling bar. This arrangement allows to compensate transverse offsets of the axis of the cylinder steering the main motor with respect to the axis of the slide guide associated to the secondary motor.
Said two end portions of the coupling bar may be coupled to the cylinder steering the main motor and to the first radial arm in such a way that at least one or both said two end portions are slidable, within predetermined stops, along axes parallel to the arm steering the main motor, the latter being in a not steering condition.
The end portion coupling the coupling bar to the end of the first radial arm may be coupled thereto by a coupling pin oriented according to a coupling axis perpendicular to the steering axis of the main motor and perpendicular to the axis of the slide guide and/or of the coupling bar. Said end portion may be slidable for a predetermined range along said coupling axis, and it may be eventually rotatable about said coupling axis.
The end portion of the coupling bar may freely slidable engage on the pin coupling to the first radial arm. Said pin may have, at the free end thereof, an enlargement for stopping the sliding.
Said enlargement may be composed of a pin head engaging by screwing with a threaded end inside a threaded bore of the first radial arm and between said threaded end and said head having an intermediate portion that is smooth and/or with a low coefficient of friction.
Particularly, said intermediate portion may be housed in a bush made of a material having a low coefficient of friction, particularly made of teflon or the like.
On the other hand, the end portion coupling the coupling bar to the cylinder steering the main motor may be freely slidable engaged on a coupling pin with a low coefficient of friction and having enlargements at the two opposite ends thereof for stopping the sliding.
Said coupling pin may be supported at the ends of two branches of a forked connection plate, which plate is integral with the cylinder steering the main motor. Sliding stops for the coupling end portion of the coupling bar may be composed of said two branches of the fork.
The second member of the steering slider may be composed of an arm radially extending outwards with respect to the slide guide and to the free end thereof a lever coupling to the arm steering the secondary motor is connected.
Advantageously, said lever may be lengthwise adjustable within predetermined extreme positions and may be further locked in the set adjusting position.
Said coupling lever may have a first threaded end that can be axially screwed/unscrewed inside a corresponding threaded bore of an end portion fastening the arm steering the secondary motor. Means for locking the screwing position may be further provided, such as a lock nut or the like, such to avoid changes in steering geometries due for example to deep vibrations or the like.
The second end of the coupling lever associated to the second radial arm of the steering slider may be advantageously adjustable with respect to the distance of said end and/or said lever from the slide guide, such to compensate transverse offsets between the slide guide and said coupling lever.
Said coupling lever may have an L-shaped end coupling to the second radial arm, while the end angled branch of said second end may have a thread cooperating with a threaded bush housed inside a corresponding bore provided at the free end of the second radial arm. Said bore may be oriented perpendicularly to the axis of said second radial arm, while said threaded bush may be axially locked inside said bore but can freely rotate such to be screwed and unscrewed on said threaded angled end so to adjust the distance between the coupling lever and the slide guide.
The steering sliding slider may further comprise a tubular slide provided with an end annular flange, a first cylindrical portion having an axial length that substantially corresponds to the thickness of a complementary bore of the second radial arm the same engaging by rotation thereto on said first smooth portion of the slide, and a second threaded portion upon which by screwing the first radial arm is engaged with a threaded bore. Thus, said first radial arm locks the second radial arm in the axial direction of the slide and so of the slide guide, while the second radial arm is free to rotate about the tubular slide. Due to this arrangement, it is possible to separately tilt the two motors.
The tubular slide may be axially slidable mounted on the slide guide and it may be freely rotatable thereon, while the second radial arm may be freely rotatable on the slide and with respect to the first radial arm, but it may be axially slidable together with the slide and the first radial arm.
According to an improvement, between the tubular slide and the slide guide and/or between the second radial arm and the tubular slide and/or between the first radial arm and the second radial arm and/or between the threaded bush fastening the angled end portion of the coupling lever and the bore housing said bush inside the second radial arm there may be provided slide means having a low coefficient of friction, such as bushs or rings with end flanges made of a material having a low coefficient of friction, particularly made of teflon or the like, interposing between surfaces of said portions movable, rotatable or slidable one with respect to the other.
Advantages of the present invention are clear from what said above and allow to make a steering hydraulic device for marine outboard motors of the type disclosed hereinbefore allowing to have a steering thrust force uniformly distributed on all motors, guaranteeing the maintenance of the same steering angle among various motors, not interfering with other components of the steering system and/or with motor hoods due to moderate overall dimensions, having the possibility to tilt independently each motor and keeping the manoeuvring possibility even if one or more motors are tilted, being extremely adaptable to different situations, above all referring to the distance change between the two motors as regards different marine vessels. Moreover the overall dimensions is reduced inside the marine vessel, above all when one or both motors are tilted, and the convergency angle of a tilted motor with respect to the other motor is reduced. The device may be applied also to motors arranged at different heights one with respect to the other. The device may be made also as a kit for simple connecting motors, one of them already provided with its own steering cylinder, and even for motors provided each with its own active steering cylinder, such to synchronize the operation. All that by means of very simple and inexpensive arrangements.
Further features and improvements are object of subclaims.
Features of the invention and advantages derived therefrom will be more apparent from the following detailed description of the accompanying figures, in which:
Referring to
In addition to the above disclosure, the present invention may be advantageously applied also in combination with more than two motors. For example, there may be provided a main motor provided with its own steering cylinder interposed between two secondary motors, each one may be driven by a system as the one above disclosed. Each system may be connected to one of the two opposite ends of the cylinder steering the main motor.
Referring now to
Of course the invention is not limited to the above disclosed and shown two embodiments, but it can be widely varied, above all as regards construction, without departing from the guiding principle disclosed above and claimed below.
Claims
1. Steering hydraulic device for marine motors (7, 8) particularly for a main outboard motor (7) and for at least a parallel secondary outboard motor (8), comprising a double-acting hydraulic cylinder (6) steering the main motor (7), which cylinder (6) can slide along a rod (10) whose axis is parallel to the axis of a tube (9) tilting the main motor (7) and it is substantially tangential or parallel to a tangent to the circle described by an arm (13) steering the main motor (7), which steering arm (13) is connected to said steering cylinder (6), particularly to a first end of said steering cylinder (6), by means of articulated linkage (12) for compensating the distance changes of the steering cylinder (6) from the pivotable end of said arm (13) steering the main motor (7) during steering steps, and which steering cylinder (6) can rotate at least about an axis, preferably about several axis parallel one with respect to the other and parallel to the axis of the tube (9) tilting the main motor (7), such to allow tilting-up and tilting-down of the main motor (7), and which cylinder (6) steering the main motor (7) is connected to an arm (17) steering the secondary motor (8) by means of linkage (24, 29, 25) articulated at least according to two axes, characterized in that the device comprises a slide guide (14, 14′) stationary associated to the secondary motor (8) and it is parallel to the axis of the tube (15) tilting the secondary motor (8), and an axial steering slider (16, 16′) sliding on said guide (14, 14′) and it is connected by means of articulated linkage (29, 36), working at least according to an axis perpendicular to the axis of the slide guide (14, 14′), to the pivotable end of the arm (17) steering the secondary motor (8), and which steering slider (16, 16′) is slidably driven at least by means of a bar (24, 35) articulately connected at least according to an axis to an end of said steering slider (16, 16′) and with the other end connected to the second end of the cylinder (6) steering the main motor (7).
2. Device according to claim 1, characterized in that said steering slider (16, 16′) may be further rotated about its own sliding axis, such to allow the independent tilting-up and tilting-down of the secondary motor (8).
3. Device according to claims 1 or 2, characterized in that the slide guide (14′) of the slider (16′) steering the secondary motor (8) is retained by a pair of arms (11), one end of each one of them is connected to one of the opposite ends of the guide (14′), while said arms (11) with the opposite ends thereof are pivotably mounted about the axis of the tube (15) tilting the secondary motor (8) or about an axis parallel to said axis of said tube (15).
4. Device according to one or more of the preceding claims, characterized in that the steering slider (16′), the slide guide (14′), means (11) fastening said guide (14′) and means (36) connecting said steering slider (16′) to the arm (17) steering the secondary motor (8) are substantially a not active copy and having the same degreees of movement freedom of the cylinder (6) steering the main motor (7), of the rod (10) upon which said cylinder (6) slides, of means (11) fastening said rod (10) and of means (12) connecting said cylinder (6) to the arm (13) steering the main motor (7).
5. Device according to one or more of the preceding claims, characterized in that articulated linkages (35) connecting the cylinder (6) steering the main motor (7) to the slider (16′) steering the secondary motor (8) are made such to allow the independent tilting of the two motors (7, 8).
6. Device according to one or more of the preceding claims, characterized in that the bar (35) connecting the slider (16′) steering the secondary motor (8) to the cylinder (6) steering the main motor (7) at each opposite ends has a ball joint (135, 135′) coupling to the slider (16′) steering the secondary motor (8) and to the cylinder (6) steering the main motor (7) respectively.
7. Device according to claims 1 or 2, characterized in that the axis of the slide guide (14) of the slider (16) steering the secondary motor (8) coincides with the axis of the tube (15) tilting the secondary motor (8).
8. Device according to one or more of claims 1, 2 and 7, characterized in that the slide guide (14) of the slider (16) steering the secondary motor (8) is the axial extension of the spindle about which the tube (15) tilting the secondary motor (8) rotates.
9. Device according to one or more of claims 1, 2, 7 and 8, characterized in that the axis of the slide guide (14) of the slider (16) steering the secondary motor (8) is an intermediate extension of axes of the tube (9) tilting the main motor (7) and of the tube (15) tilting the secondary motor (8) approximately coaxial or coaxial one with respect to the other.
10. Device according to one or more of the preceding claims 1, 2, 7 to 9 characterized in that the slider (16) steering the secondary motor (8) is composed of two separate members (19, 20), which two members (19, 20) are slidably integral one with respect to the other along the slide guide (14), a first member (20) being rotatable independently of a second member (19) about the axis of the slide guide (14).
11. Device according to one or more of the preceding claims 1, 2, 7 to 10, characterized in that the first member is composed of an arm (20) radially extending outwards with respect to the slide guide (14) and to the free end thereof a bar (24) for coupling to the cylinder (6) steering the main motor (7) is connected.
12. Device according to claim 11, characterized in that said bar (24) coupling the cylinder (6) steering the main motor (7) to the first radial arm (20) is lengthwise adjustable within predetermined stops.
13. Device according to claims 11 or 12, characterized in that said coupling bar (24) has two end portions (124, 124′) coupling to the cylinder (6) steering the main motor (7) and to the first radial arm (20) respectively.
14. Device according to one or more of the preceding claims 1, 2, 7 to 13 characterized in that it has means for adjusting the distance of one or both the end portions (124, 124′) coupling the coupling bar (24) to the end of the first radial arm (20) and from the fastening point to the cylinder (6) steering the main motor (7) according to an axis transverse, particularly perpendicular, to the axis of said coupling bar (24), in order to compensate transverse offsets of the axis of the cylinder (6) steering the main motor (7) with respect to the axis of the slide guide (14) associated to the secondary motor (8).
15. Device according to one or more of the preceding claims 1, 2, 7 to 14, characterized in that said two end portions (124, 124′) of the coupling bar (24) are coupled to the cylinder (6) steering the main motor (7) and to the first radial arm (20) in such a way that at least one or both said two end portions (124, 124′) are slidable, within predetermined stops, along axes parallel to the arm (13) steering the main motor (7), in a not steering condition thereof.
16. Device according to claims 14 or 15, characterized in that the end portion (124′) coupling the coupling bar (24) to the end of the first radial arm (20) is coupled thereto by a coupling pin (27) oriented according to a coupling axis perpendicular to the steering axis of the main motor (7) and perpendicular to the axis of the slide guide (14) and/or of the coupling bar (24), said end portion (124′) being movable for a predetermined range along said coupling axis, and being eventually rotatable about said coupling axis.
17. Device according to one or more of claims 14 to 16, characterized in that the end portion (124′) of the coupling bar (24) freely slidable engages on the pin (27) coupling to the first radial arm (20), which pin (27) has, at the free end thereof, an enlargement (127) for stopping the sliding.
18. Device according to claim 17, characterized in that said stop enlargement at the free end of the pin (27) coupling to the first radial arm (20) is composed of an head (127) of a pin (27) engaging by screwing with a threaded end inside a threaded bore (220) of the first radial arm (20) and between said threaded end and said head (127) having an intermediate portion that is smooth and/or with a low coefficient of friction.
19. Device according to claim 18, characterized in that the intermediate portion between the enlarged head (127) of the pin (27) and the threaded end is housed in a bush (28) made of a material having a low coefficient of friction, particularly made of teflon or the like.
20. Device according to one or more of the preceding claims 1, 2, 7 to 19, characterized in that the end portion (124) coupling the coupling bar (24) to the cylinder (6) steering the main motor (7) is freely slidable engaged on a coupling pin (25) with a low coefficient of friction and having enlargements at the two opposite ends thereof for stopping the sliding.
21. Device according to claim 20, characterized in that said coupling pin (25) is supported by the two ends of two branches of a forked connection plate (26), which plate (26) is integral with the cylinder (6) steering the main motor (7), sliding stops for the coupling end portion (124) of the coupling bar (24) being composed of said two branches of the forked plate (26).
22. Device according to one or more of the preceding claims 1, 2, 7 to 21, characterized in that the second member of the steering slider is composed of an arm (19) radially extending outwards with respect to the slide guide (14) and to the free end thereof a lever coupling to the arm (17) steering the secondary motor (8) is connected.
23. Device according to claim 22, characterized in that said lever (29) coupling to the arm (17) steering the secondary motor (8) is lengthwise adjustable within predetermined extreme positions, being further lockable in the set adjusting position.
24. Device according to claim 23, characterized in that said coupling lever (29) has a first threaded end (129) that can be axially screwed/unscrewed inside a corresponding threaded bore of a end portion (30) fastening the arm (17) steering the secondary motor (8), means for locking the screwing position being provided, such as a lock nut or the like.
25. Device according to one or more of the preceding claims 22 to 24, characterized in that the second end of the coupling lever (29) associated to the second radial arm (19) of the steering slider (16) is adjustable with respect to the distance of said end and/or said lever (29) from the slide guide (14).
26. Device according to claim 25, characterized in that the coupling lever (29) has an L-shaped end coupling to the second radial arm (19), while the end angled branch of said second end may have a thread (229) cooperating with a threaded bush (31) housed inside a corresponding bore (219) provided at the free end of the second radial arm (19), said bore (219) being oriented perpendicularly to the axis of said second radial arm (19), and said threaded bush (31) being axially locked inside the bore (219) but it can freely rotate such to be screwed and unscrewed on said threaded angled end (229) so to adjust the distance between the coupling lever (29) and the slide guide (14).
27. Device according to one or more of the preceding claims 1, 2, 7 to 26, characterized in that the steering sliding slider (16) comprises a tubular slide (18) provided with an end annular flange (118), a first cylindrical portion (218) having an axial length that substantially corresponds to the thickness of a complementary bore (119) of the second radial arm (19) the same engaging by rotation thereto on said first smooth portion (218) of the slide (18), and a second threaded portion (318) upon which by screwing the first radial arm (20) is engaged with a threaded bore (120), which first radial arm (20) locks the second radial arm (19) in the axial direction of the slide (18) and so of the slide guide (14), while said second radial arm (19) is free to rotate about the tubular slide (18).
28. Device according to claim 27, characterized in that the tubular slide (18) is axially slidable mounted on the slide guide (14) and it may be freely rotatable thereon, while the second radial arm (19) is freely rotatable on the slide (18) and with respect to the first radial arm (20), but may be axially slidable together with the slide (18) and the first radial arm (20).
29. Device according to one or more of the preceding claims 1, 2, 7 to 28, characterized in that between the tubular slide (18) and the slide guide (14) and/or between the second radial arm (19) and the tubular slide (18) and/or between the first radial arm (20) and the second radial arm (19) and/or between the threaded bush (31) fastening the angled end portion of the coupling lever (29) and the bore (219) housing said bush (31) inside the second radial arm (19) there are provided slide means having a low coefficient of friction, such as bushes or rings or bushes (33, 34, 21) with end flanges (133) made of a material having a low coefficient of friction, particularly made of teflon or the like, interposing between surfaces of said portions movable, rotatable or slidable one with respect to the other.
30. Kit for connecting marine motors (7, 8) for controlling thereof in a synchronizing way, particularly for an outboard main motor (7) and at least a parallel outboard secondary motor (8), wherein a double-acting hydraulic cylinder (6) steering the main motor (7) is provided, which cylinder (6) is slidable along a rod (10) whose axis is parallel to the axis of a tube (9) tilting the main motor (7) and it is substantially tangential or parallel to a tangent to the circle described by an arm (13) steering the main motor (7), which steering arm (13) is connected to said steering cylinder (6), particularly to a first end of said steering cylinder (6) by means of articulated linkage (12) for compensating distance changes of the steering cylinder (6) from the pivotable end of said arm (13) steering the main motor (7) during steering steps, and which steering cylinder (6) is rotatable about at least an axis, preferably about several axes parallel one with respect to the other and parallel to the axis of the tube (9) tilting the main motor (7), so to allow the tilting-up and tilting-down of the main motor (7), and which cylinder (6) steering the main motor (7) is connected by means of linkage (24, 29, 35) articulated according at least two axes to an arm (17) steering the secondary motor (8), characterized in that the kit comprises a slide guide (14, 14′) stationary associated to the secondary motor (8) and it is parallel to the axis of the tube (15) tilting the secondary motor (8), and a steering axial slider (16, 16′) sliding on said guide (14, 14′) and it is connected to the pivotable end of the arm (17) steering the secondary motor (8) by means of articulated linkage (29, 36), working at least according to an axis perpendicular to the axis of the slide guide (14, 14′), and which steering slider (16, 16′) is slidably driven by means of at least a bar (24, 35) articulately connected according to at least an axis with an end to said steering slider (16, 16′) and with the other end to the second end of the cylinder (6) steering the main motor (7).
31. Connecting kit according to claim 30, characterized in that it is manufactured according to one or more of claims 2 to 29.
32. Steering hydraulic device for marine motors and kit connecting various marine motors for controlling the steering thereof in a synchronizing way, totally or in part, as disclosed, shown and for the above aims.
Type: Application
Filed: Jun 6, 2005
Publication Date: Jan 31, 2008
Applicant: ULTRAFLEX S.P.A. (Casella)
Inventors: Giorgio Gai (Genova), Alessandro Staiolo (Ronco Scrivia)
Application Number: 11/571,297
International Classification: B63H 20/08 (20060101);